The horizontal range and maximum height of a projectile are equal.The angle of projection is
Options
(a) θ=tan⁻¹(1/4) (b) θ=tan⁻¹(4) (c) θ=tan⁻¹(2) (d) θ=45ﾟ
Correct Answer:
θ=tan⁻¹(4)
Explanation:
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A and B are two vectors and θ is the angle between them ,if ｜A x B｜=√3(A･B),the value of θ is
Options
(a) 60ﾟ (b) 45ﾟ (c) 30ﾟ (d) 90ﾟ
Correct Answer:
60ﾟ
Explanation: […]
If r denotes the distance between sun and the earth, then the angular momentum of the earth around the sun is proportional to
Options
(a) r³/r (b) r (c) √r (d) r²
Correct Answer: […]
A particle has initial velocity (3i + 4j) and acceleration (0.1 i+0.3j). It’s speed after 10s is
Options
(a) 7 units (b) √7 m/s² (c) 5 m/s² (d) 1 m/s²
Correct Answer:
5 m/s²
Under the action of a force F=cx, the position of a body changes from 0 to x.The work done is
Options
(a) 1/2 Cx ² (b) Cx ² (c) Cx (d) 1/2 Cx
The mass of a lift is 2000kg. When the tension in the supporting cable is 28000N, then its acceleration is
Options
(a) 4ms⁻² upwards (b) 4 ms⁻² downwards (c) 14 ms⁻² upwards (d) […]
A body under the action of a force F⃗ = 6i⃗–8j⃗+10k⃗, acquires an acceleration of 1 m/s². The mass of this body must be
Options
(a) 10 kg (b) 20 kg (c) 10 […]
Charge of Electron (e) = 1.602 x 10⁻¹⁹ Coulombs Explanation
The elementary charge is the electric charge carried by a single proton or electron. This elementary charge is a fundamental physical constant and is measured […]
Speed of light in vacuum (c) = 3 x 10⁸ m/sec Explanation
In km/sec, it is close to 300K Kilometres/sec. If you could travel at the speed of light, you could go around the Earth […]
1 peta (P) =10¹⁵ Explanation
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